double levelling是什么意思

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用法例句

Accurate analysis of total station instrument to replace leveling survey;

全站仪代替水准测量精度分析

In this paper,the theories,techniques,methodologies,and results of monitoring primary fractures connecting to the injection well in Anpeng Alkali Mine are presented, which combines micro-seismic monitoring with leveling survey techniques.

介绍了在桐柏安棚碱矿,用微地震监测结合水准测量监测与注水井连通的原生裂隙带的理论、技术、方法和监测结果,并据此部署开采井位,把采液井打在与注水井连通的裂隙带上,实现了2条注、采井1 000 m井下裂隙带连通,使安棚碱矿可以连续注水、采出碱液,从而获得较高的生产水平和经济效益。

According to Tongliao power plant water source engineering,it particular discuss basis theory and means of combine of GPS and leveling survey,availability results is obtained.

文章结合通辽电厂水源工程,详细论述了GPS和水准测量相结合的基本原理及工作方法,并得出了有益的结论,对今后类似的工程具有一定的借鉴作用。

Substitute of the leveling measurement of crossing rivers with EDM triangle elevation;

用EDM三角高程代替跨河水准测量

Digital Leveling and Building GIS Data Management System;

数字化水准测量及其GIS数据管理系统的建立

Variation Characteristics of Leveling Data of Datong Central Seismological Observatory of Shanxi;

山西大同中心地震台水准测量数据变化特征

Determination of level survey admissible error;

水准测量允许误差的确定

The integrative system development on indoor and outdoor works base on PDA level survey;

水准测量内外业PDA一体化系统开发

By restricting side length and vertical angle of observing sides, the level survey can be replaced by the triangle elevation method so that measuring accuracy can be increased, the labor strength be reduced and the working time be saved.

通过限制观测边的边长、垂直角的角度,可以用水准式三角高程测量的方法代替三四等水准测量。

It is presented that the conclusion that total station apparatus triangulated height measurement cannot fully replace leveling surveying at every aspect through detailed analysis and the comparison between the errors of triangulated height measurement and those of leveling surveying, thus provides a reference for the method selection.

本文分析和对比了三角高程测量误差与水准测量误差,得出全站仪三角高程测量不能普遍代替水准测量的结论,给高程测量方法的选择提供了参考根据。

In view of the above-mentioned facts,based on a vast amount of GPS surveying data and leveling surveying data,the law of variations of GPS height anomaly of the P.

鉴于上述原因,笔者与科研组以大量的GPS测量成果和水准测量成果为依据,对我国境内GPS高程异常的变化规律进行了较为系统的整体性分析与研究,初步总结出了我国境内GPS高程异常的变化规律,借助计算机建模技术、通过大量的演算,给出了我国境内GPS高程异常的初步数学模型,为相关领域的研究工作提供了一个参考依据。

0 from Microsoft Company in the leveling surveying to reduce the workload on the field.

0在编写水准测量程序中的实践方法。

To measure the different elevations of(a tract of land)with a level.

测量水平用水准仪对（土地）做水准测量

Automatic level and high-grade level survey as well as deformation monitoring

自动安平水准仪与高等级水准测量和变形监测

The High Precision Level Measures in Settlement Observation Application;

高精度水准测量在沉降观测中的应用

Study of Normal Height Difference Fitting Method of GPS River-crossing Leveling

GPS水准高差拟合应用于跨河水准测量研究

DATA COMMUNICATION OF LEICA DNA SERIES DIGITAL LEVLES VIA RS232 SERIAL INTERFACE AND LEVELING SURVEY INTEGRATION SYSTEM

徕卡DNA水准仪串口通信及水准测量一体化系统

Implementation of National First Order Leveling using High Accuracy Electronic Level

利用精密电子水准仪进行国家一等水准测量

Precision Analysis of Total Station Trigonometric Leveling Replace Leveling

全站仪三角高程测量替代水准测量的精度分析

Specification for the first and second order leveling

GB12897-1991国家一、二等水准测量规范

Specifications for the third and fourth order leveling

GB12898-1991国家三、四等水准测量规范

The preliminary computation is the same as that for ordinary levelling.

概算与普遍水准测量相同。

The Application of Visual Basic 6.0 in the Leveling Surveying

VB语言在编写水准测量程序中的应用

Research and development of Smart Survey leveling survey integration system

Smart Survey水准测量一体化系统设计与开发

The Application of Trigonometric Leveling and GPS in River-crossing Leveling

三角高程、GPS在跨河水准测量的应用

The discuss of the precision in the GPS height replacing the 4 and 5 grade leveling

GPS测高技术代替四、五等水准测量精度探讨

THE SURFACE DEFORMATION CHARACTERISTICS OF A RESERVOIR BASED ON GPS AND LEVELING

基于GPS与水准测量研究某水库表面变形特征

A Leveling Method for Quickly Acquiring Settlement Value

一种快速获得沉降量值的水准测量方法

Geodetic leveling should be done with staves in which the divisions are marked on a strip of invar.

大地水准测量必须使用刻度标于不胀钢片上的水准标尺。

Geodetic levelling should be done with staves in which the divisions are marked on a strip of invar.

大地水准测量必须使用分划刻在因瓦带上的水准标尺。